/*
 * Copyright 2010 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */
package com.cleangwt.cell.client;

import com.cleangwt.json.client.SimpleObject;
import com.google.gwt.cell.client.AbstractCell;
import com.google.gwt.cell.client.Cell;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;

/**
 * A {@link Cell} used to render a field of {@link SimpleObject}.
 */
public class SimpleCell extends AbstractCell<SimpleObject> {

  private final String fieldName;

  /**
   * Creates a simple cell with the given field name.
   * 
   * @param fieldName the field name to retrieve a value of simple object
   */
  public SimpleCell(String name) {
    this.fieldName = name;
  }

  @Override
  public void render(Context context, SimpleObject value, SafeHtmlBuilder sb) {
    if (value != null) {
      sb.appendEscaped(format(value.get(fieldName)));
    }
  }

  /**
   * Formats the field value.
   * 
   * @param value the field value
   * @return the text to display
   */
  protected String format(Object value) {
    return String.valueOf(value);
  }
}
